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Math::Int64(3pm) - phpMan Math::Int64(3pm) - phpMan

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Math::Int64          (3pm)  - Manipulate 64 bits integers in Perl
Math::Int64::die_on_overflow (3pm)  - catch overflows when using Math::Int64
Math::Int64::native_if_available (3pm)  - Use the native Perl 64-bit integer implementation when available